I need help with IBD or Doggie Crohn's disease

My Golden Retriever has been diagnosed with Crohn’s Disease or IBD (inflamed bowel disease), he has dropped almost 30 pounds in the past 3 months. What I have read about the Crohn’s and IBD, seems there is not much difference between the two.
I’ve cooked home meals for him and my German Shepherd to make him better. Now he doesn’t care to eat at all!
Has anyone experienced this with there pets? I would like to compare notes with others on this topic!